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Hives can also be classified by the purported causative agent. Many different substances in the environment may cause hives, including medications, food and physical agents. In perhaps more than 50% of people with chronic hives of unknown cause, it is due to an autoimmune reaction. [7] Risk factors include having conditions such as hay fever or ...
Chronic spontaneous urticaria, despite its cause being unknown, is linked to a higher prevalence of autoimmune diseases, and is often worsened by triggers like stress, infections, certain foods, or nonsteroidal anti-inflammatory drugs. The hives and angioedema seen in CSU is thought to be linked to the degranulation of skin mast cells.
Another common stress rash culprit is Cortisol, according to Jeffrey T.S. HSU, M.D., F.A.A.D. “Higher levels of Cortisol can cause inflammation as well as triggering histamine to release, which ...
Stress hives look similar to other types of skin rashes, but have a different cause. Here, find stress hive pictures and how to get rid of stress hives.
Skin allergies frequently cause rashes, or swelling and inflammation within the skin, in what is known as a "weal and flare" reaction characteristic of hives and angioedema. [ 29 ] With insect stings, a large local reaction may occur in the form of an area of skin redness greater than 10 cm in size that can last one to two days. [ 30 ]
Back pain. When your back aches and there’s no obvious cause (like lifting heavy boxes or falling), inflammation could be the root cause. Inflammatory back pain tends to come on gradually and ...